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Patented Sept.. 27, 1881.

By ttorl-Leys N PETERS F ul gn wmingmmnlc.

POINTER EORPLUMB LEVELS.

N. THOMAS 8v E. D. SGHOEIELD.

UNITED STATES PATENT OEEICE.

NATHAN J. THOMAS AND BENJAMIN D. SCHOFIELD, OF FOWLERVILLE,

MICHIGAN; SAID THOMAS ASSIGNOR TO SAID SCHOFIELD.

POINTER FOR PLUMB-LEVELS.

SPECIFICATION formingpart of Letters Patent No. 247,711, dated September27, 1.881.

Application filed J une 11, 1881.

To all whom 'it may concern Be it known that We, NATHAN JOSEPH THOMASand BENJAMIN D. ScHoEIELD, ot' Fowlerville, in the county ot' Livingstonand State of Michigan, have invented certain new and useful Improvementsin Level-Plumbs; and we do hereby declare that the following is a full,clear, and exact description of the inveution, which will enable othersskilled in the art to which it appertains to make and use the same,reference being had to the accom panying` drawings, which form a part otthis specification, and in Which- Figure 1 is a front view, and Fig. 2is a diametrical section through the cup and pointer or indicator.

Similar letters of reference indicate corresponding parts in both thefigures.

Our invention contemplates an improved construction ot' level-plumbs andangle-indicators, as hereinafter more -l'ully described, andparticularly pointed out in the claim.

In the annexed drawings, A is the body of the implement, which is of oodor any other suitable material, of any desired size.

B is a circular cup or recess, in the'bottoin of which is a circular'graduated disk, C, having a central pivot or pintle,'D, t'or the pointerE. The latter has an open base, a, within which is hung` on the rod b aweight or roller, c, of the configuration shown in the drawings.

' The cup or recess B has a glass cover, F, which may be protected by aslide or shield,G, when the instrument is not in use.

(No model.)

It' desired, the graduated disk C may havea Vernier attachment to adapttheinstrument to indicate variations of 355% degrees or 60 minutes. Themain scalemay either be from Oto 360,0r it may be subdivided into fourquarters, marked from (l to 15each; or any other subdivision ma y beused, according to the particular purpose for which theinstrunientis tobe used,

as We do not limit ourselves to any particular y scale or graduationofthe disk C.

The roller c serves the double purpose of Weighting the end of thepointer and of steadying it and preventing undue vibrations by itstrictional contact with the disk C, thus saving time in reading ott' theindications and contributing to their accuracy.

Having thus described our invention, We

vclaim and desire to secure by Letters Patent NATHAN JOSEPH THOMAS.BENJAMIN D. scHoEIELD.-

Witnesses:

GEORGE L. ADAMS, JAMES MCCARTY.

